Summary
Nintendo is warningSuper Smash Bros. Ultimateplayers against using any Mii Fighters in online multiplayer matches while the developers try to sort out a game-breaking issue. There are a couple of new problems with Mii Fighters inSuper Smash Bros. Ultimate, but Nintendo assures fans that both will be addressed quickly.
There are nearly 30launch games available on Nintendo Switch 2as of the new console’s release on July 23, 2025.Super Smash Bros. Ultimateisn’t among that number, but it is still playable on the Switch 2 for those who have a copy of the original Switch game, thanks to the new console’s backwards compatibility.
While that ease of access is a nice touch for fans, an unexpected error regardingSuper Smash Bros. Ultimate’s Mii Fightersis causing Nintendo and developer Bandai Namco to take action. As originally pointed out by Twitter user OatmealDome,Nintendo’s Japanese support websitereports that Mii Fighters are causing problems in online matches, potentially triggering a bug that kicks everyone out before a match even starts. This problem seemingly only occurs when one player is on a Switch and the other is on a Switch 2, and while developers are working on a fix, the website requests that players avoid using Mii Fighters in online matches until further notice.
Super Smash Bros. Ultimate on Switch 2 Has a Big Mii Fighter Problem
A second, somewhat related problem concerns Mii Fighter thumbnails when one of these characters is created or edited while the game is being played on a Nintendo Switch 2 console. Some thumbnails do not accurately reflect newly created or edited Mii Fighters' appearances, which can ruin the immersion for players, considering that the wide variety ofcostumes for Mii Fightersmakes their inclusion a highly customizable part ofSuper Smash Bros. Ultimate.The solution to this problem seems relatively simple, though, as Nintendo states that players may be able to fix it themselves by reentering the character creator and saving the custom character a second time.
Despite its release nearly six and a half years ago, the crossover fighting game remains quite popular. A report from February putSuper Smash Bros. Ultimatein third place on the list ofbest-selling Switch Gamesof all time, trailing onlyMario Kart 8 DeluxeandAnimal Crossing: New Horizons, with more than 35.8 million copies sold. With the Switch 2 now available, there has still been no official announcement of a sequel, but creator Masahiro Sakurai has made past comments indicating that anotherSmash Bros. game is a possibility.
Super Smash Bros. Ultimate
WHERE TO PLAY
Gaming icons clash in the ultimate brawl you can play anytime, anywhere! Smash rivals off the stage as new characters Simon Belmont and King K. Rool join Inkling, Ridley, and every fighter in Super Smash Bros. history. Enjoy enhanced speed and combat at new stages based on the Castlevania series, Super Mario Odyssey, and more!Having trouble choosing a stage? Then select the Stage Morph option to transform one stage into another while battling—a series first! Plus, new echo fighters Dark Samus, Richter Belmont, and Chrom join the battle. Whether you play locally or online, savor the faster combat, new attacks, and new defensive options, like a perfect shield. Jam out to 900 different music compositions and go 1-on-1 with a friend, hold a 4-player free-for-all, kick it up to 8-player battles and more!
